Ionization chamber for a smoke detector



FIG. 1 is a top perspective view of an ionization chamber for a smoke detector showing my new design;

FIG. 2 is an enlarged top plan view thereof;

FIG. 3 is an enlarged side elevational view taken in the direction of the arrows along line 3--3 of FIG. 2;

FIG. 4 is an enlarged bottom plan view thereof;

FIG. 5 is a bottom perspective view thereof. 

The ornamental design for an ionization chamber for a smoke detector, as shown and described. 